Dimensional optimization of beetle kill pine Interlocking ...
Transcript of Dimensional optimization of beetle kill pine Interlocking ...
Dimensional optimization of beetle kill pine
Interlocking Cross Laminated Timber (ICLT).
Massih Nilforoushan Hamedani
MSAS, University of Utah
• Background
• Research Question
• Methods
• Findings
• Conclusion
• Acknowledgments
Quick Review
• What is Mountain Pine Beetle
• Mapping Pine Beetle
• Solid Timber Construction and BKP
Mountain Pine Beetle
Background
Before and after images from the Landsat 5 satellite
reveal beetle damage in Rocky Mountain National
Park in Colorado.
Credit: USGS/NASA’s Earth Observatory
• Glued
• Glu-laminated Timber (GLT)
• Laminated Veneer Lumber (LVL)
• Cross Laminated Timber
• Non-glued solutions
• Nail-laminated Timber (NLT)
• Interlocking Cross Laminated Timber (ICLT)
Solid Timber Products
Background
Credit: ITAC
• Introduction
Interlocking Cross Laminated Timber
Background
Girls scout cabin, Utah, Credit: ITAC
Research Question
What is the impact of moisture content of ICLT panels on dimensional stability of them?
Research Question
• Hygrothermal analysis of the ICLT assemblies (One dimensional computer modeling)
• Literature review of drying methods and schedules and wood moisture relations
• Survey data from different stages of supply chain
• Experiment hygrothermal behavior and dimensional changes of ICLT wall assembly (girls scout cabins in Utah)
Methods
Hygrothermal Analysis (drying rate) of
ICLT panel
Finding / Data
• Wall Assemblies:
• Insulated / Non-insulated
• Vapor open / Vapor tight
• Simulation Climate Conditions• Anchorage, Alaska
• Seattle, Washington
• Salt Lake City, Utah
• Minneapolis, Minnesota
• Atlanta, Georgia
• Miami, Florida
• Baltimore, Maryland
• Boston, Massachusetts
Dimensional Change
Finding / Data
• Dimensional change within the moisture content limits of 6% to 14% estimated by:
∆𝐷 = 𝐷𝐼 [𝐶𝑇 𝑀𝐹 −𝑀𝐼 ]∆𝐷: change in dimension
𝐷𝐼 : dimension at start of change
𝐶𝑇 :dimensional change coefficient
𝑀𝐹 : moisture content at end of change
𝑀𝐼 : moisture content at start of change
• Example: a flat grained 9.15 in white fir board at 8% MC will be 9.217 in at 11% MC.
Conclusion
Conclusion / Future Research
• Drying schedule suggestion (minimizing dimensional changes and setting pitch)
• Future Research:
• Evaluation of BKP solid timber production supply chain in western region
• ICLT Potential market in western region
Conclusion
Acknowledgements
• University of Utah
• Integrated Technology in Architecture Center
• US Forest Service, Forest Products Laboratory
• Euclid Timber, LLC, Heber, Utah
Q&A
Questions?